Discrete aperture detection system for large-aperture telescope

Abstract

The embodiment of the invention discloses a discrete aperture detection system for a large-aperture telescope, which comprises a kinematic interface and a discrete aperture detection subsystem mountedon the telescope by the kinematic interface. The discrete aperture detection subsystem comprises a plane mirror, a mechanical rotary table, a surface shape regulation execution mechanism and a wave front information calculation processor, wherein an aperture of the plane mirror is smaller than a full aperture of the telescope; the mechanical rotary table is used for driving the plane mirror to move so as to implement complete covering of the plane mirror used as a discrete sub-aperture on the aperture of the telescope; the surface shape regulation execution mechanism is arranged below the plane mirror and is used for carrying out bitwise open-loop correction on a surface shape of the plane mirror; the plane mirror and an interferometer at a Nasmyth focus of the telescope constitute a self-collimation optical path; and the wave front information calculation processor is used for obtaining wave front information of the telescope according to surface shape data of each discrete sub-aperture after surface shape correction in the process that the plane mirror moves to cover the full aperture of the telescope. According to the invention, self-collimation test accurate and test efficiency of the telescope are effectively promoted, and the discrete aperture detection system is also beneficial for reducing self-collimation test cost.

Description

technical field [0001] Embodiments of the present invention relate to the field of discrete aperture self-collimation testing, in particular to a discrete aperture detection system for large aperture telescopes. Background technique [0002] In order to realize a deeper and more detailed exploration of the universe, the aperture of the telescope is getting larger and larger. The large-aperture plane mirror is usually used as a self-alignment inspection mirror for detecting the optical system of a large-aperture telescope, as well as a correction mirror and a return mirror in the system. The optical system is matched, and the size of the corresponding flat mirror is getting larger and larger. [0003] As the caliber increases, the cost of the plane mirror increases rapidly. According to the idea of ​​"testing the big with the small", it is effective to reduce the cost of self-collimation testing by using a plane mirror with a smaller diameter instead of a large-diameter plane...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present disclosure provides a discrete aperture detection system for a large-aperture telescope, which solves the disadvantages of the related art using the sub-aperture splicing algorithm for self-collimation testing

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